UI_a027 — Auto Steer MIA

Full alert identifier: UI_a027_AutoSteerMIA

Alert description

Missing CAN message from Driver Assistance ECU (DAS) or Cruise or Autopilot state went to FAULT.

Potential impact

Cruise or Autopilot unavailable

Set condition

CAN message 'ETH_DAS_STATUS_MID' from DAS not received by the UI whilst drive rail ON, or Cruise state went to FAULT when Autopilot was active, or Autopilot state changed from ACTIVE to FAULT

Clear condition

Cruise & Autopilot resume standard operation

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of UI_a027.

UI_a190 — Tuner MIA UI_a190_TunerMIA The radio tuner appears to be MIA to the MCU and cannot issue commands.
UI_a029 — Modem MIA UI_a029_ModemMIA One or more of the messages the User Interface (UI) Electronic Control Unit (ECU) receives periodically from the cellular modem is not received, indicating the cellular modem may be unavailable (MIA).
UI_a175 — Ethernet Logging Mia UI_a175_EthernetLoggingMia The media control unit (MCU) does not receive the expected ethernet data from the high voltage (HV) system, indicating ethernet logging and uploading may be unavailable (MIA).
UI_a206 — Modem MIA After Wake UI_a206_ModemMIAAfterWake Although the modem is requested to resume, it was not discovered on ethernet bus.
UI_a054 — Audio Boost Power Bad UI_a054_AudioBoostPowerBad The external amplifier's boost power has detected an issue during initialization.

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